For example, as in the well-known example of domestication of foxes, just select

For example, as in the well-known example of domestication of foxes, just selecting for testosterone levels (one change) will produce domestication. In humans it’s the same basic developmental difference: 1) neoteny and 2) selection pressure: class size.
Vast racial differences.

Reply addressees: @aptest_eve @JadeBai85455803 @SPQRIUS